This is the Arrma AR330245 O Ring P3 3.5x1.9mm Red (4pcs) ARAC7451

These high-quality silicone O-rings provide the perfect replacement for your kit items.

FEATURES

High-quality silicone for smooth operation and consistent fitting

INCLUDES

4 x Silicone O-rings - Outside Diameter x Thickness - 3.5x1.9mm - per pack